Montgomery County, IA

184 public highway bridges

Montgomery County Bridge Snapshot

Montgomery County, Iowa contains 184 public highway bridges in the FHWA National Bridge Inventory. Roughly 20.1% are rated “Good,” 52.7% “Fair,” 26.6% “Poor,” and 26.6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in IA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

184

Total Bridges

20.1%

Good

26.6%

Poor

26.6%

Structurally Deficient

Condition Distribution

Good

20.1% (37)

Fair

52.7% (97)

Poor

26.6% (49)

SD

26.6% (49)

All Bridges (184)

Sort:

FM

Over: WALNUT CREEK TRIB

071392802, Montgomery, IA

Built 1965 Load: 24.5 t ADT: 153

US 71

Over: BNSF RR

0.9 MI. South OF SR N-46, Montgomery, IA

Built 1972 Load: 24.9 t ADT: 1,640

FM

Over: BR NODAWAY WEST

072362102, Montgomery, IA

Built 1958 Load: 24.9 t ADT: 34

FM

Over: INDIAN CREEK

073390302, Montgomery, IA

Built 1957 Load: 25.1 t ADT: 45

LOCAL

Over: INDIAN CREEK

073392001, Montgomery, IA

Built 1956 Load: 25.1 t ADT: 29

IA 48

Over: RED OAK CREEK

1.3 MI S OF JCT. US 34, Montgomery, IA

Built 1918 Load: 26.0 t ADT: 4,460

FM

Over: EAST TARKIO

071373501, Montgomery, IA

Built 1969 Load: 26.1 t ADT: 45

LOCAL ROAD

Over: WALNUT CREEK

072390103, Montgomery, IA

Built 1930 Load: 26.2 t ADT: 15

FM

Over: WALNUT CREEK

073383101, Montgomery, IA

Built 1967 Load: 26.3 t ADT: 199

FM

Over: CREEK

073381402, Montgomery, IA

Built 1975 Load: 27.2 t ADT: 60

US 34

Over: MIDDLE NODAWAY RIVER

3.0 MI. E JCT. US 71, Montgomery, IA

Built 1964 Load: 28.1 t ADT: 2,240

FM

Over: NISHNABOTNA RIVER

071393603, Montgomery, IA

Built 1972 Load: 28.1 t ADT: 133

LOCAL

Over: NODAWAY RIVER

073361302, Montgomery, IA

Built 1982 Load: 28.1 t ADT: 50

US 71

Over: MIDDLE NODAWAY RIVER

2.2 MI. S OF SR H-46, Montgomery, IA

Built 1972 Load: 28.2 t ADT: 2,090

LOCAL RD

Over: LOCAL DRAINAGE

072381801, Montgomery, IA

Built 1961 Load: 28.9 t ADT: 35

IA 48

Over: EAST NISHNABOTNA RIVER

1.9 MI. S OF SR H14, Montgomery, IA

Built 1960 Load: 29.4 t ADT: 1,210

LOCAL

Over: SMALL STREAM

073363006, Montgomery, IA

Built 1987 Load: 29.4 t ADT: 5

WB US 34

Over: WEST NODAWAY RIVER

0.3 MI. W OF JCT. US 71, Montgomery, IA

Built 1970 Load: 29.8 t ADT: 1,325

FM

Over: EAST TARKIO CREEK

071372504, Montgomery, IA

Built 1969 Load: 29.9 t ADT: 50

IA 48

Over: EAST NISHNABOTNA RIVER

1.7 MI. N OF JCT. 34, Montgomery, IA

Built 1973 Load: 30.0 t ADT: 2,080

FM

Over: TARKIO CREEK

072372801, Montgomery, IA

Built 1978 Load: 30.2 t ADT: 509

US 34

Over: INDIAN CREEK

1.2 MI. E OF US 59, Montgomery, IA

Built 1964 Load: 31.7 t ADT: 4,030

LOCAL

Over: SIN CREEK

073362502, Montgomery, IA

Built 1964 Load: 31.7 t ADT: 15

FM

Over: NISHNABOTNA TRIB

071380901, Montgomery, IA

Built 1959 Load: 32.3 t ADT: 72

US 34

Over: CRABAPPLE CREEK

3.1 MI. E OF US 59, Montgomery, IA

Built 1964 Load: 32.6 t ADT: 4,030

FM

Over: TARKIO CK

072372601, Montgomery, IA

Built 1977 Load: 32.7 t ADT: 338

FM

Over: LITTLE TARKIO CREEK

072382507, Montgomery, IA

Built 1993 Load: 32.7 t ADT: 509

LOCAL

Over: NODAWAY RIVER

071362104, Montgomery, IA

Built 1993 Load: 33.9 t ADT: 60

LOCAL-CASS#104B

Over: TARKIO CREEK

073370201, Montgomery, IA

Built 1990 Load: 33.9 t ADT: 11

LOCAL

Over: NISHNABOTNA TRIB

073370704, Montgomery, IA

Built 1968 Load: 34.1 t ADT: 89

FM

Over: TARKIO CREEK TRIB

073372603, Montgomery, IA

Built 1970 Load: 34.2 t ADT: 26

FM

Over: RED OAK CREEK

072382705, Montgomery, IA

Built 1968 Load: 34.5 t ADT: 1,275

LOCAL

Over: DRAINAGE

071381302, Montgomery, IA

Built 1992 Load: 34.8 t ADT: 45

US 34

Over: LITTLE TARKIO CREEK

0.2 MI. E of SR M63, Montgomery, IA

Built 1964 Load: 35.1 t ADT: 2,880

IA 48

Over: OVERFLOW NISHNABOTNA

2.0 mi. S of Jct. SR H14, Montgomery, IA

Built 1973 Load: 35.1 t ADT: 1,210

FM

Over: NISHNABOTNA TRIB

073381304, Montgomery, IA

Built 1957 Load: 35.3 t ADT: 34

US 71

Over: FULTONS CREEK

3.4 mi. N of jct. US 34, Montgomery, IA

Built 1972 Load: 35.5 t ADT: 1,390

FM

Over: W NODAWAY RIVER

072362801, Montgomery, IA

Built 1987 Load: 36.6 t ADT: 338

FM

Over: TRIB OF W NODAWAY

072361602, Montgomery, IA

Built 1995 Load: 36.7 t ADT: 50

100TH ST

Over: DRAINAGE

073360605, Montgomery, IA

Built 1990 Load: 37.2 t ADT: 20

FM

Over: TARKIO CREEK

072370302, Montgomery, IA

Built 1988 Load: 38.8 t ADT: 270

FM

Over: WALNUT CREEK

072393310, Montgomery, IA

Built 1988 Load: 39.4 t ADT: 153

LOCAL ROAD

Over: BRANCH OF TARKIO CREEK

072373301, Montgomery, IA

Built 1992 Load: 40.5 t ADT: 11

US 34

Over: WEST TARKIO CREEK

0.5 MI E OF E JCT. SR H34, Montgomery, IA

Built 1964 Load: 49.1 t ADT: 3,990

FM

Over: CRABAPPLE CREEK

072392903, Montgomery, IA

Built 1994 Load: 50.0 t ADT: 436

LOCAL ROAD

Over: LOCAL STREAM

071380406, Montgomery, IA

Built 1996 Load: 99.9 t ADT: 20

FM

Over: STREAM

071383201, Montgomery, IA

Built 1970 Load: 99.9 t ADT: 170

FM

Over: WALNUT CREEK TRIB

071390404, Montgomery, IA

Built 1966 Load: 99.9 t ADT: 150

LOCAL ROAD

Over: INDIAN CREEK

073392901, Montgomery, IA

Built 1977 Load: 21.0 t ADT: 20

M55 J AVE

Over: NISHNABOTNA TRIB

073383502, Montgomery, IA

Built 2003 Load: 24.9 t ADT: 26

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026